Quick Question On Saving Items

I got a quick question concerning saving documents, pictures, etc. Whenever I want to save a document to particular location such as my thumb drive--I can choose to save it to that drive...but is there a way to choose to save to a particular folder within the thumb drive? Because the only way I can figure out how to do that is to simply save it to the thumb drive, and then go back in to the thumb drive and drag the file to the folder I want it to go to. Is there a way to do this while saving it for the first time?

Yep:

Just click on the black triangle icon next to the save as name.
The window should expand to a finder-like view, where you can navigate between folders, create new ones etc.

Ah--I see it now. Thanks for the help.